Development of expandable graphite
Graphite crystal has a hexagonal network plane layered structure composed of carbon elements. The carbon atoms on the layer plane are bound by strong covalent bonds, while the layers are bound by van der Waals force. The binding is very weak, and the distance between layers is large. Therefore, under appropriate conditions, acid, alkali gold, salt and other chemical substances can be inserted into the graphite layers, It combines with carbon atoms to form a new chemical phase Graphite Intercalation on Compounds (GIC). When heated to an appropriate temperature, this interlayer compound can instantly and rapidly decompose, generating a large amount of gas, which makes graphite expand along the axis into a new worm like material, namely expanded graphite. This unexpanded graphite interlayer compound is expandable graphite.
Expandable graphite was first discovered by Schaufautl, a German. In 1841, Schaufautl soaked natural graphite in a mixture of concentrated HNO3 and concentrated H2SO4, and took it out for drying several hours later. It was found that the graphite had expanded. United Carbide first applied for a patent for the manufacturing technology of expandable graphite in 1963 and carried out industrial production in 1968.
The above is some knowledge of expandable graphite for your reference. If you have questions or need to buy products, you can call at any time!
After the project is completed, the annual output of spherical graphite will be 2,000 tons, and the annual sales income will be 120 million yuan.
Shandong is one of China's important industrial base provinces. Especially since the reform and opening up, Shandong has not only occupied an important position in the light industry, but also the chemical industry has developed rapidly. After more than two decades of reform and opening up, it has already had a solid foundation.
In 2011, the export situation of flake graphite was relatively sluggish.
Spherical graphite is made of high-quality high carbon natural flake graphite by using advanced processing technology to modify the surface of graphite to produce graphite products with different fineness and oval shape.
High purity graphite means that the carbon content of graphite is more than 99.99%.
Qingdao Jinhui Graphite Co., Ltd.
Nantanpo Village, Zhangshe Town, Pingdu City, Qingdao, Shandong Province, China
You can search for the product you want